Wrong board, next time please post on >>>/wsr/
Anyways, I think it's just a random OC, not a character from a show or anything.
If you google the artists name (Seradna) you end up at this person's Deviantart page. I don't think they drew the character, they just made this wallpaper, and they're pretending like they drew it. All their submissions in their DA gallery are like that. Perhaps you could reach out to them and ask where the girl is from.